Process of preparing wood, cellulose, and other substances for the absorption of preservatives or coloring matter



ple, a hydrocarbon, or

Patented Aug. 18, 1925.

GERMANY, ASSIGNQR TO GEEK. HIlfilIiiELSBAGl-El CARL SCHANTZ. OFFREIBURG, BAIDEN,

AKTIENGESELLSCHAFT, 01 FREIBURG, BADEN, G-ERIVIANY.

PROCESS OF PREPARING WOOD, CELLULOSE. AND OTHER SUBSTANCES FORABSORPTION OF PRESliR-VATIVES OR COLORING lllh'tTTER.

No Drawing.

To (r/l/ tU/IOHL it llm'lj/ concern:

Be it. known that 1, Cum. S(.IL'\1\Z"IZ. a citi zen oi the GermanRepublic, residing at lfireibnrg, Baden, German ,have invented a certainnew and useful Process of Preparin Wood, Cellulose, and- ()therSubstances tor the Absorption oi Preservatives or Colorine Matter, ofwhich the following is a specification.

Substances such as wood and cellulose, which swell under the notion ofmoisture, are nevertheless dillieult to treat etleetirolv by absorption.with preservatives and coloring inalt'er. This is more particularly thecase it the preservative or coloring matter is astringent or tends toreduce the capacity of the substance to swell, as is the case withcaustic n-eservatives. The most, etle'rtive absorption is obtained, whenthe substance treated is distended to the fullest possible extent. Forthis purpose itis common to treat thesubstance with steam, but to dothis ettectively requires a comparatively long time, and the substanceis then liable to deteriorate under the action of the steam.

According to my invention the duration of the treatment is muchshortened, Without deleterious effects on the substance mum, by usingfor the process a homologue oi phenol, together with steam or vapor. of.some volatile organic substance, for examalcohol, or tetrachloride ofcarbon. By this means the period of treatment may be reduced to aboutone thircl of the time which is required when Application filed J'u 1y16,

pure steam is used, and the temperature used may be reduced to abouttux. ,thirds. thilv a small percentage of the phenol homo log-lie. whichmay be one of the eresols need he added to the steam, the action thereofbeing, apparently, catalytic.

Wood. tor example, may be treated at; a temperature below i00 U. 0.5 to2 (g. oi cresol being used per cubic meter of wood. 'llge duration ofthe trcetinent may vary from, say, 6 to 18 hours, according to thenature of the wood.

ll'hcn Well distended by this treatment the wood is ready'for beingpreserved or colored by one of the well-known processes. ll hat i clannas my invention and desire to secure by Letters Patent; of the llnitetlStates is:-

1. The process oi preparing substsnee's, which, are capable of beingdistended moisture, tor absorption of preservatives or coloring matter,consisting in treating); such substances ivitbvnpor containing aniltliillls'" ture ol a homologue of phenol.

l. The process of preparing substginces, which are ca} iable of being;tlistentietl by moisture, "for absorption of preservatives or coloringmatter,'consistin in treating sueh' substances with vapor oil a volatileorganic substance having an admixture oi at homes logne "of phenol. I

In WltDBSS whereof I revs signed this specification.

Du. CARL SGHALNTZ,

